ESCAP , {s.a}
Majalah, Jurnal, Buletin
Yayasan Bina Asia-Pasifik, 2012
Majalah, Jurnal, Buletin
edited by Richard Maidment and Colin Mackerras
Routledge, 1998
Buku Teks
Education Research Institute Seoul National University, 2005
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De La Saller University, 2005
Majalah, Jurnal, Buletin